Light emitting diode lamp and light emitting device
AssigneeNational Institute for Materials Science
InventorsNaoto Hirosaki, Ken Sakuma, Kyota Ueda, Hajime Yamamoto
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Abstract
A bullet type light emitting diode lamp or a chip-type light emitting diode lamp includes a semiconductor light emitting element, and a plurality of fluorescent materials that absorb part or whole of light emitted from the semiconductor light emitting element, and emit fluorescence at a wavelength different from that of the absorbed light. The fluorescent materials include a phosphor of a CaAlSiN3 crystalline phase.
Claims11
A bullet type light emitting diode lamp or a chip-type light emitting diode lamp to be mounted on a substrate, comprising:
- a semiconductor light emitting element, and a plurality of fluorescent materials that absorb part or whole of light emitted from the semiconductor light emitting element, and emit fluorescence at a wavelength different from that of the absorbed light,
- wherein the plurality of fluorescent materials comprise a phosphor composed of a CaAlSiN3 crystalline phase.
A visible light emitting device, comprising:
- a semiconductor light emitting element that emits bluish purple or blue light,
- a support member for placing the semiconductor light emitting element therein,
- a terminal for supplying electric power to the semiconductor light emitting element, and
- a fluorescent material that absorbs part or whole of light emitted from the semiconductor light emitting element, and emits fluorescence at a wavelength different from that of the absorbed light, wherein
- the fluorescent material comprises a phosphor of a CaAlSiN3 crystalline phase that is obtained by firing using an electric furnace of a resistance heating type.
Dependencies are inferred from the claim text.